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                "id": "CVE-2024-35889",
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          "product": "Linux",
          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: fix kernel panic on unknown packet types\n\nIn the very rare case where a packet type is unknown to the driver,\nidpf_rx_process_skb_fields would return early without calling\neth_type_trans to set the skb protocol / the network layer handler.\nThis is especially problematic if tcpdump is running when such a\npacket is received, i.e. it would cause a kernel panic.\n\nInstead, call eth_type_trans for every single packet, even when\nthe packet type is unknown."
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              "value": "AV:N - The bug is reached purely by processing a received Ethernet frame in the idpf splitq NAPI RX path, before any protocol demux, socket lookup, or firewall, so any remote party able to get a packet to the interface triggers it. Frames that the E2100/IPU parser leaves unclassified include routable traffic (unusual IP protocol numbers, exotic IPv6 extension-header chains, unsupported nested tunnels), so reachability is not limited to the local L2 segment.\nAC:L - The attacker fully controls the only variable that matters \u2014 the packet\u0027s protocol layout \u2014 and can sweep encapsulations until the NIC returns a ptype absent from the driver\u0027s lookup table; no race, no memory grooming, no timing window. The consumers that turn the malformed skb into a panic or an OOB read (AF_PACKET/tcpdump taps, bridge/OVS rx_handler, GRO header comparison) are ubiquitous on the cloud-host and cloud-VM systems where idpf is deployed, and the GRO path needs no extra configuration at all.\nPR:N - No credentials, authentication, or local account are required; the panic occurs in idpf\u0027s softirq RX path before any protocol demux, so the frame need not even be addressed to a listening service. Any unauthenticated sender on the network suffices.\nUI:N - Triggering requires only that the victim\u0027s idpf interface be up and receiving; the fault happens in softirq context during ordinary packet reception. No local user or administrator has to open, mount, or click anything.\nS:U - The vulnerable driver code and the impacted resource are both the same kernel \u2014 a standard in-kernel crash and in-kernel OOB read with no crossing of a VM, IOMMU, or sandbox security authority.\nC:L - Because mac_header is left at the 0xFFFF \"unset\" sentinel, consumers dereference skb-\u003ehead + 65535: gro_list_prepare()\u0027s compare_ether_header() reads 14 bytes of unrelated kernel memory out of bounds on the normal GRO path, and br_handle_frame() reads eth_hdr()-\u003eh_source from the same address, with those out-of-bounds bytes then learned into the bridge FDB where any local user can read them back via netlink. The disclosure is real but bounded to a fixed 14-byte window rather than an arbitrary read.\nI:L - Out-of-bounds bytes are written into kernel forwarding state (bridge FDB entries learned from head+65535), and the skb is propagated with corrupted metadata \u2014 protocol 0, wrapped mac_len, un-stripped Ethernet header \u2014 which misdirects downstream forwarding and header parsing. There is no arbitrary-write primitive: skb_push()\u0027s underflow is caught by the skb_under_panic() bounds check before any memory is written, so the impact is limited rather than High.\nA:H - packet_rcv()/tpacket_rcv() computes a ~4-billion-byte skb_push() length from the unset mac_header, driving skb-\u003edata below skb-\u003ehead and hitting skb_under_panic() \u2192 BUG() from NAPI/softirq context \u2014 a fatal exception in interrupt and a full kernel panic. A single crafted frame takes the machine down and can be replayed at will against every affected host."
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          "url": "https://git.kernel.org/stable/c/dd19e827d63ac60debf117676d1126bff884bdb8"
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    "cveId": "CVE-2024-35889",
    "datePublished": "2024-05-19T08:34:45.274Z",
    "dateReserved": "2024-05-17T13:50:33.113Z",
    "dateUpdated": "2026-08-05T11:30:43.420Z",
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